（混合移动开发）使用cordova-broadcaster插件监听手机屏幕开关广播

最近在开发部门的一个APP，需要有消息推送功能，前端用轮询，一开始用了cordova-plugin-background-mode插件使其可以后台运行，但是用这个插件太耗电了，也没找到解决方法。后来想到可以在手机屏幕解锁时进行查询，又了解到这种监听属于广播，于是就用到了今天要讲的cordova-broadcaster广播插件。
cordova-broadcaster插件官网
怎么添加cordova插件这里就不教学了…
js里的代码

  document.addEventListener("deviceready", onDeviceReady, false);
  function onDeviceReady() {
        if (window.broadcaster) {
        	  console.log(window.broadcaster);
		      var listener = function( e ) {
		            //接收到广播信息
		            //console.log( "didShow received! userInfo: " + JSON.stringify(e)  );
		      }
		      window.broadcaster.addEventListener( "didShow", listener);
        }else {
            console.log('windown.broadcaster not available');
        }        
    }

这里要修改 \platforms\android\src\com\包名\项目名\MainActivity.java中的代码，也就是要注册广播。（默认的cordova项目中，此文件是不需要修改的）
接着有一些类要自己引入，比如其中用到的LocalBroadcastManager类，需要引入
import android.support.v4.content.LocalBroadcastManager;
详细代码

package com.mycompany.tt;

import android.os.Bundle;
import org.apache.cordova.*;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.support.v4.content.LocalBroadcastManager;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.view.Menu;
import android.widget.Toast;


public class MainActivity extends CordovaActivity
{    
   //下面三行是要增加的代码
    private LocalBroadcastManager lbm;
	private IntentFilter intentFilter;
	private StateChangeReceiver stateChangeReceiver;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
         //下面7行时要增加的代码
        lbm=LocalBroadcastManager.getInstance(this);			
		intentFilter = new IntentFilter();
		intentFilter.addAction(Intent.ACTION_SCREEN_ON);
        intentFilter.addAction(Intent.ACTION_SCREEN_OFF);
        intentFilter.addAction(Intent.ACTION_USER_PRESENT);
		stateChangeReceiver = new StateChangeReceiver();
		registerReceiver(stateChangeReceiver, intentFilter);
        
		

        // enable Cordova apps to be started in the background
        Bundle extras = getIntent().getExtras();
        if (extras != null && extras.getBoolean("cdvStartInBackground", false)) {
            moveTaskToBack(true);
        }
        
        // Set by <content src="index.html" /> in config.xml
        loadUrl(launchUrl);
    }
	//从这里往下都是要增加的代码
	class StateChangeReceiver extends BroadcastReceiver{
        private String action = null;
		@Override
		public void onReceive(Context context, Intent intent) {
			 action = intent.getAction();
			 //这里是之前的例子，可以得到网络变化
			 //ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
			 //NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();			
			if(Intent.ACTION_SCREEN_ON.equals(action)){
				//Toast.makeText(context, "开屏", Toast.LENGTH_SHORT).show();
				Intent intents = new Intent("didShow");

				Bundle b = new Bundle();
				b.putString( "data", "开屏" );
				intents.putExtras( b);

				lbm.sendBroadcastSync(intents);
			}else if(Intent.ACTION_SCREEN_OFF.equals(action)){
				//Toast.makeText(context, "锁屏", Toast.LENGTH_SHORT).show();
				Intent intents = new Intent("didShow");

				Bundle b = new Bundle();
				b.putString( "data", "锁屏" );
				intents.putExtras( b);

				lbm.sendBroadcastSync(intents);
			}else if (Intent.ACTION_USER_PRESENT.equals(action)){
				//Toast.makeText(context, "解锁", Toast.LENGTH_SHORT).show();
				Intent intents = new Intent("didShow");

				Bundle b = new Bundle();
				b.putString( "data", "解锁" );
				intents.putExtras( b);

				lbm.sendBroadcastSync(intents);
			}
		}
		
	}
	
	@Override
	public void onDestroy() {
		super.onDestroy();
		//取消注册
		unregisterReceiver(stateChangeReceiver);
	}	
}

增加权限
在 platforms\android\AndroidManifest.xml内增加

 <uses-permission android:name="android.permission.RECEIVE_USER_PRESENT" />